import time

start = time.time()
for i in range(1000):
    result = []
    for m in range(10000):
        result.append(i*1000+m*100)

end = time.time()
print("耗时：{0}".format(end-start))

start2 = time.time()
for i in range(1000):
    result = []
    c = i*1000
    for m in range(10000):
        result.append(c+m*100)
end2 = time.time()
print("耗时:{0}".format(end2-start2))